diff --git a/src/main/java/baritone/process/BuilderProcess.java b/src/main/java/baritone/process/BuilderProcess.java
index 9b932a65..f3f138c9 100644
--- a/src/main/java/baritone/process/BuilderProcess.java
+++ b/src/main/java/baritone/process/BuilderProcess.java
@@ -84,7 +84,7 @@ public final class BuilderProcess extends BaritoneProcessHelper implements IBuil
     private int layer;
     private int numRepeats;
     private List<IBlockState> approxPlaceable;
-    public final int[] selectionYBounds = {0, 0};
+    public int stopAtHeight = 0;
 
     public BuilderProcess(Baritone baritone) {
         super(baritone);
@@ -95,6 +95,7 @@ public final class BuilderProcess extends BaritoneProcessHelper implements IBuil
         this.name = name;
         this.schematic = schematic;
         this.realSchematic = null;
+        boolean buildingSelectionSchematic = schematic instanceof SelectionSchematic;
         if (!Baritone.settings().buildSubstitutes.value.isEmpty()) {
             this.schematic = new SubstituteSchematic(this.schematic, Baritone.settings().buildSubstitutes.value);
         }
@@ -113,21 +114,22 @@ public final class BuilderProcess extends BaritoneProcessHelper implements IBuil
         this.origin = new Vec3i(x, y, z);
         this.paused = false;
         this.layer = Baritone.settings().startAtLayer.value;
-        if (Baritone.settings().buildOnlySelection.value) {
+        this.stopAtHeight = schematic.heightY();
+        if (Baritone.settings().buildOnlySelection.value && buildingSelectionSchematic) {  // currently redundant but safer maybe
             if (baritone.getSelectionManager().getSelections().length == 0) {
                 logDirect("Poor little kitten forgot to set a selection while BuildOnlySelection is true");
-            }
-            if (Baritone.settings().buildInLayers.value) {
+                this.stopAtHeight = 0;
+            } else if (Baritone.settings().buildInLayers.value) {
                 OptionalInt minim = Stream.of(baritone.getSelectionManager().getSelections()).mapToInt(sel -> sel.min().y).min();
                 OptionalInt maxim = Stream.of(baritone.getSelectionManager().getSelections()).mapToInt(sel -> sel.max().y).max();
-                logDirect(String.format("Schematic starts at y=%s with height %s", y, schematic.heightY()));
-                logDirect(String.format("Selection starts at y=%s and ends at y=%s", minim.isPresent() ? minim.getAsInt() : 0, maxim.isPresent() ? maxim.getAsInt() : 0));
                 if (minim.isPresent() && maxim.isPresent()) {
-                    selectionYBounds[0] = Baritone.settings().layerOrder.value ? y + schematic.heightY() - maxim.getAsInt() : minim.getAsInt() - y;
-                    selectionYBounds[1] = Baritone.settings().layerOrder.value ? y + schematic.heightY() - minim.getAsInt() : maxim.getAsInt() - y;
+                    int startAtHeight = Baritone.settings().layerOrder.value ? y + schematic.heightY() - maxim.getAsInt() : minim.getAsInt() - y;
+                    this.stopAtHeight = (Baritone.settings().layerOrder.value ? y + schematic.heightY() - minim.getAsInt() : maxim.getAsInt() - y) + 1;
+                    this.layer = Math.max(this.layer, startAtHeight / Baritone.settings().layerHeight.value);  // startAtLayer or startAtHeight, whichever is highest
+                    logDebug(String.format("Schematic starts at y=%s with height %s", y, schematic.heightY()));
+                    logDebug(String.format("Selection starts at y=%s and ends at y=%s", minim.getAsInt(), maxim.getAsInt()));
+                    logDebug(String.format("Considering relevant height %s - %s", startAtHeight, this.stopAtHeight));
                 }
-                this.layer = this.selectionYBounds[0] / Baritone.settings().layerHeight.value;
-                logDirect("Skipped everything under layer " + this.layer);
             }
         }
 
@@ -479,8 +481,7 @@ public final class BuilderProcess extends BaritoneProcessHelper implements IBuil
         }
         BuilderCalculationContext bcc = new BuilderCalculationContext();
         if (!recalc(bcc)) {
-            checkAboveSelection();
-            if (Baritone.settings().buildInLayers.value && layer * Baritone.settings().layerHeight.value < realSchematic.heightY()) {
+            if (Baritone.settings().buildInLayers.value && layer * Baritone.settings().layerHeight.value < stopAtHeight) {
                 logDirect("Starting layer " + layer);
                 layer++;
                 return onTick(calcFailed, isSafeToCancel, recursions + 1);
@@ -570,7 +571,6 @@ public final class BuilderProcess extends BaritoneProcessHelper implements IBuil
         if (goal == null) {
             goal = assemble(bcc, approxPlaceable, true); // we're far away, so assume that we have our whole inventory to recalculate placeable properly
             if (goal == null) {
-                checkAboveSelection();
                 if (Baritone.settings().skipFailedLayers.value && Baritone.settings().buildInLayers.value && layer * Baritone.settings().layerHeight.value < realSchematic.heightY()) {
                     logDirect("Skipping layer that I cannot construct! Layer #" + layer);
                     layer++;
@@ -584,14 +584,6 @@ public final class BuilderProcess extends BaritoneProcessHelper implements IBuil
         return new PathingCommandContext(goal, PathingCommandType.FORCE_REVALIDATE_GOAL_AND_PATH, bcc);
     }
 
-    private void checkAboveSelection() {
-        if (Baritone.settings().buildInLayers.value && Baritone.settings().buildOnlySelection.value &&
-                this.layer * Baritone.settings().layerHeight.value > this.selectionYBounds[1]) {
-            logDirect("Skipped everything above layer " + this.layer);
-            this.layer = realSchematic.heightY() / Baritone.settings().layerHeight.value;
-        }
-    }
-
     private boolean recalc(BuilderCalculationContext bcc) {
         if (incorrectPositions == null) {
             incorrectPositions = new HashSet<>();